Ultrasonic horn



FIG. 1 is a front elevational view of an ultrasonic horn showing an embodiment of my new design, the rear elevational view being a mirror image;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image; and,

FIG. 3 is a top plan view thereof, the bottom plan view being a mirror image. 

The ornamental design for an ultrasonic horn, as shown and described. 